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U.S. ZIP Codes Database 2026

Search by ZIP code, city, county, or state and find clear postal details with maps, time zones, and area code data.

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Okanogan County ZIP Codes

Browse all ZIP Codes, cities, and associated area codes registered in Okanogan County.

County State ZIP Code City Area Codes
Okanogan County WA 98846 Pateros 509
Okanogan County WA 98849 Riverside 509
Okanogan County WA 98855 Tonasket 509
Okanogan County WA 98856 Twisp 360, 509, 564
Okanogan County WA 98859 Wauconda 509
Okanogan County WA 98862 Winthrop 360, 509, 564
Okanogan County WA 99116 Coulee Dam 509
Okanogan County WA 99124 Elmer City 509
Okanogan County WA 99155 Nespelem 509
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About U.S. ZIP Codes

ZIP codes are a United States Postal Service system introduced in 1963 to make mail routing more accurate and efficient. The standard format uses five digits, while ZIP+4 adds four more digits for a more precise delivery segment.

ZIP codes cover the United States, its territories, military mail routes, and other USPS delivery points. This directory organizes that data for practical lookup by ZIP code, city, county, and state.